Choppy video but audio spot on

I tried to record some video and it is choppy but the audio is fine.&nbsp; I subscribe to this webcast and would like to share&nbsp;some of the episodes with my family and thought that maybe this&nbsp;program&nbsp;could assist me in&nbsp;doing this.&nbsp;Can anyone help me out with this issue? I did this while using the trial and now the trial is up.&nbsp; I will purchase the software if this can be remedied. I do have a sample of this video but it is 9MB and won't post on here.